Your links are incorrect.
Unusually, AMD decided for the 10.12 CCC2 Preview Package, they would split the downloads into Vista x86/64 & Windows 7 x86/64 (and not Vista/7 x86 and Vista/7 x64). Theirfor you have only linked to Windows 7 versions and XP. Vista x86/64 is a seperate download.

one thing you don’t seem to see nVidia doing is artificially limiting Global Memory to half the available memory on the video card… I don’t understand why ATI/AMD have to do this, is there a reason for it perhaps JeGX do you know